For creating a light probe from such a scene it should be rendered using
a spherical camera:

camera {
spherical
angle 360, 180
}

This renders an omnidirectional view of the scene that can be mapped on a sphere using
spherical mapping.

Table 4.2. Views and illumination maps from the scene

lighting 1

lighting 2

When this light probe is rendered it can be used in scenes as an illumination map
to achieve realistic lighting in another scene without the whole content of the original
scene being included and slowing down the render.

Table 4.3. The illumination maps being used in a scene

lighting 1

lighting 2

In this scene the image map is applied to a large sphere around the scene:

When this light probe is rendered it can be used in scenes as an illumination map
to achieve realistic lighting in another scene without the whole content of the original
scene being included and slowing down the render.